Add validation mechanism for the WRP messages #25
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Add validation functionality in wrp-go library for clients to use. |
This was referenced Apr 22, 2022
denopink
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May 25, 2022
## Overview related to xmidt-org#25, xmidt-org#78, xmidt-org/scytale#88, xmidt-org/talaria#153 s.t. we want a validation mechanism that is configurable by the application & verifies the spec. ### tl;rd This pr introduces the initial validation framework, where applications supply validators (satisfying the `Validator interface`) to `NewMsgTypeValidator` and then used to verify the spec. <details> <summary> Explanation</summary> Apps supply validators satisfying: ```go // Validator is a WRP validator that allows access to the Validate function. type Validator interface { Validate(m Message) error } ``` and listing which validators are used on known and unknown msg types (where unknown msg types are handled by `defaultValidator`): ```go var alwaysValidMsg ValidatorFunc = func(msg Message) error { return nil } msgv, err := NewMsgTypeValidator( // Validates known msg types m: map[MessageType]Validators{SimpleEventMessageType: {alwaysValidMsg}}, // Validates unknown msg types defaultValidator: alwaysValidMsg) err = msgv.Validate(Message{Type: SimpleEventMessageType}) // Known msg type err == nil // True err = msgv.Validate(Message{Type: CreateMessageType}) // Unknown msg type, uses defaultValidator err == nil // True ``` if a default validator is not provided, all unknown msg type will **fail** by default ```go var alwaysValidMsg ValidatorFunc = func(msg Message) error { return nil } msgv, err := NewMsgTypeValidator( // Omitted defaultValidator m: map[MessageType]Validators{SimpleEventMessageType: {alwaysInvalidMsg()}}) err = msgv.Validate(Message{Type: CreateMessageType}) err != nil // True ``` </details> <details> <summary>Type of Change(s)</summary> - Non-breaking Enhancement - All new and existing tests passed. </details> <details> <summary>Module Unit Testing: [PASSING]</summary> </details> <details> <summary>PR Affecting Unit Testing: validator_test.go [PASSING]</summary> ```console Running tool: /usr/local/bin/go test -timeout 30s -run ^(TestHelperValidators|TestMsgTypeValidator)$ github.com/xmidt-org/wrp-go/v3 === RUN TestHelperValidators === RUN TestHelperValidators/alwaysInvalidMsg --- PASS: TestHelperValidators (0.00s) --- PASS: TestHelperValidators/alwaysInvalidMsg (0.00s) === RUN TestMsgTypeValidator === RUN TestMsgTypeValidator/MsgTypeValidator_validate === RUN TestMsgTypeValidator/MsgTypeValidator_validate/known_message_type === RUN TestMsgTypeValidator/MsgTypeValidator_validate/unknown_message_type_with_provided_default_Validator === RUN TestMsgTypeValidator/MsgTypeValidator_validate/known_message_type_with_a_failing_Validator === RUN TestMsgTypeValidator/MsgTypeValidator_validate/unknown_message_type_without_provided_default_Validator === RUN TestMsgTypeValidator/MsgTypeValidator_factory === RUN TestMsgTypeValidator/MsgTypeValidator_factory/with_provided_default_Validator === RUN TestMsgTypeValidator/MsgTypeValidator_factory/without_provided_default_Validator === RUN TestMsgTypeValidator/MsgTypeValidator_factory/empty_list_of_message_type_Validators === RUN TestMsgTypeValidator/MsgTypeValidator_factory/empty_value_'m'_map[MessageType]Validators --- PASS: TestMsgTypeValidator (0.00s) --- PASS: TestMsgTypeValidator/MsgTypeValidator_validate (0.00s) --- PASS: TestMsgTypeValidator/MsgTypeValidator_validate/known_message_type (0.00s) --- PASS: TestMsgTypeValidator/MsgTypeValidator_validate/unknown_message_type_with_provided_default_Validator (0.00s) --- PASS: TestMsgTypeValidator/MsgTypeValidator_validate/known_message_type_with_a_failing_Validator (0.00s) --- PASS: TestMsgTypeValidator/MsgTypeValidator_validate/unknown_message_type_without_provided_default_Validator (0.00s) --- PASS: TestMsgTypeValidator/MsgTypeValidator_factory (0.00s) --- PASS: TestMsgTypeValidator/MsgTypeValidator_factory/with_provided_default_Validator (0.00s) --- PASS: TestMsgTypeValidator/MsgTypeValidator_factory/without_provided_default_Validator (0.00s) --- PASS: TestMsgTypeValidator/MsgTypeValidator_factory/empty_list_of_message_type_Validators (0.00s) --- PASS: TestMsgTypeValidator/MsgTypeValidator_factory/empty_value_'m'_map[MessageType]Validators (0.00s) PASS ok github.com/xmidt-org/wrp-go/v3 0.303s > Test run finished at 5/25/2022, 11:39:22 AM < ``` </details>
This was referenced Jun 3, 2022
This was referenced Aug 3, 2022
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Ideally the validation mechanism is configurable by the application & the validators verify the spec.
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